FORMULATION LOGIC
Formulated as a
Synergistic System
Sleep and recovery are governed by interconnected systems regulating neurotransmission, stress response, and parasympathetic tone. This formulation targets those systems using evidence-aligned mechanisms, clinically relevant doses, and transparent active delivery. Rather than acting in isolation, each ingredient is selected for its complementary role in supporting night-time recovery.
Nervous System Support
Magnesium, L-theanine, and vitamin B6 (as P5P) support relaxation and parasympathetic activity, helping the body transition from an alert state to a recovery state.
WHY THIS MATTERS:
Efficient nervous system down-regulation is central to sleep onset, muscle relaxation, and overnight recovery. Magnesium contributes to normal psychological function and the reduction of tiredness and fatigue. Vitamin B6 contributes to normal nervous system function and normal energy-yielding metabolism.
Stress Modulation
Ashwagandha supports the body's response to stress, which plays a key role in sleep disruption and recovery capacity.
WHY THIS MATTERS:
Elevated cumulative stress can impair sleep quality and recovery, particularly during periods of high physical or cognitive demand.
Sleep Quality Support
Apigenin supports sleep quality through non-melatonin GABAergic pathways.
WHY THIS MATTERS:
Sleep continuity and depth are more strongly associated with recovery and next-day performance than sedation alone.
Five ingredients. Every dose explained.
Magnesium supports the nervous system's shift from activation to recovery — modulating excitatory (NMDA) and inhibitory (GABA) signalling. The bisglycinate form is selected for superior absorption over the cheap oxide form in most supplements, and its glycine co-transport adds a secondary calming mechanism.
Requirements increase with physical load and stress — both common in ARC's target users.
EU Health Claim: Magnesium contributes to normal muscle function and the reduction of tiredness and fatigue.
150mg elemental magnesium reflects amounts used in sleep and stress research, comfortably below levels associated with GI discomfort.
Sleep quality: RCTs show improvements in sleep efficiency, total sleep time, and early morning awakening.
Cortisol modulation: Adequate magnesium status is associated with a more controlled cortisol response to stressors.
Depletion risk: Intake falls below recommended levels in a significant proportion of adults — higher in athletes and high-stress populations.
Who benefits most
Those with high training loads, elevated daily stress, or poor dietary magnesium intake — particularly common in athletes, shift workers, and anyone under sustained cognitive or physical demand.
L-Theanine promotes alpha wave activity — the relaxed, non-drowsy brainwave state associated with calm focus. It also supports GABAergic activity, increasing GABA, serotonin, and dopamine availability to create neurochemical conditions conducive to sleep onset.
High-purity form, standardised for consistent active content.
L-theanine is dose-sensitive — most positive clinical outcomes use200mg or above.Many products fall quietly short of this. ARC's dose is disclosed so you can verify it against the literature.
Alpha wave promotion: Multiple EEG studies confirm significant increases in relaxed brainwave activity without drowsiness.
Sleep quality: Shown to improve sleep efficiency and reduce disturbances in high-stress populations.
Synergy with magnesium: Additive relaxation effects through complementary nervous system mechanisms.
Who benefits most
Those who struggle to mentally switch off in the evening — particularly people with demanding cognitive jobs, high screen exposure late in the day, or difficulty transitioning from work-mode to rest.
Ashwagandha modulates the hypothalamic-pituitary-adrenal (HPA) axis — the body's central stress response system. For high-output individuals, chronically elevated cortisol is a primary upstream driver of poor sleep that most sleep supplements ignore entirely.
The Sabinsa extract is standardised to 7% withanolides and backed by human study data — not all ashwagandha extracts are equivalent.
Unlike most adaptogens, ashwagandha's effect onsleep quality specificallyhas been confirmed in RCTs — not just inferred from cortisol activity.
Cortisol reduction: Multiple RCTs show statistically significant reductions in serum cortisol, with effects building over 8–12 weeks.
Sleep quality (direct): RCT demonstrated improvements in sleep onset latency, total sleep time, and efficiency.
Athletic recovery: Associated with improved recovery markers and reduced exercise-induced cortisol response.
Who benefits most
Those with high accumulated stress, poor sleep despite adequate time in bed, or intense training loads — where elevated cortisol is the underlying driver rather than simply poor sleep hygiene.
Apigenin binds to GABA-A receptors at a non-benzodiazepine site — supporting relaxation and sleep onset without the dependency risk associated with pharmaceutical agents targeting the same receptor.
It is ARC's melatonin-free pathway to sleep quality support — non-hormonal, non-sedating, and dosed at the upper end of what clinical literature has studied.
Melatonin alters circadian signalling and is not suited to long-term nightly use. Apigenin achievescomparable sleep quality supportthrough a fundamentally different mechanism.
GABA-A activity: Characterised binding at non-benzodiazepine site — anxiolytic and sleep-promoting without dependency potential.
Sleep onset & quality: Clinical studies show improvements in sleep onset latency and subjective sleep quality in adults.
No next-day impairment: No evidence of morning cognitive impairment at clinically relevant doses.
Who benefits most
Those who want long-term nightly sleep support without melatonin — including anyone who has experienced grogginess or dependency with melatonin-based products, or who prefers to avoid hormonal interference.
P5P is the bioactive form of Vitamin B6 — the co-enzyme the body actually uses to synthesiseGABA, serotonin, and dopamine.Most supplements use cheaper pyridoxine HCl, which must be converted by the liver first. ARC uses P5P directly,bypassing hepatic conversionand ensuring bioavailability regardless of individual enzyme variation.
EU authorised claim:Vitamin B6 contributes to normal functioning of the nervous system and to normal energy-yielding metabolism.
P5P's role in ARC is as abiochemical co-factor— ensuring the neurotransmitter pathways that the other ingredients act on have what they need to function. Dosed within studied physiological ranges.
GABA synthesis: Required co-factor for glutamic acid decarboxylase — the enzyme that converts glutamate to GABA.
Serotonin pathway: Essential for tryptophan-to-serotonin conversion, supporting sleep-wake regulation.
Direct bioavailability: More reliable than standard B6 across individuals with varied liver enzyme activity.
Who benefits most
Those with suboptimal B6 status, high protein diets, or impaired hepatic conversion — and anyone who wants to ensure their neurotransmitter synthesis pathways are properly supported rather than assumed.
Mechanistic Sleep Support
clinically supported
Built for Consistency
Evidence-Based Synergy
Research-informed dosing and selection.
Every ingredient was selected for a specific purpose and included at a dose aligned with the literature. No proprietary blends. No unnecessary additions.
Selected to complement the formula alongside targeted ingredients
Magnesium bisglycinate (20%)
INGREDIENT
Scientific backing
Established
Representative studies
8
High-purity L-theanine, standardised for consistent active content
L-theanine (60%)
INGREDIENT
Scientific backing
Well-established
Representative studies
6
Branded extract standardised to 7% withanolides, supported by human studies
Ashwagandha (7% sabinsa extract)
INGREDIENT
Scientific backing
Well-established
Representative studies
5
Positioned at the upper end of doses studied in scientific literature
Apigenin
INGREDIENT
Scientific backing
Emerging
Representative studies
7
Bioavailable vitamin B6 included within studied physiological ranges
P5P
INGREDIENT
Scientific backing
Functionally supported
Representative studies
6
Every ingredient was selected for a specific purpose and included at a dose aligned with the literature. No proprietary blends. No unnecessary additions.
Five ingredients. one purpose.
Melatonin-free. Fully disclosed. Clinically dosed. Two capsules, once per night.
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